Cam and lever.



W. ROSE.

GAM AND LEVER.

ArrLxoATIon num 11.111,18, 1910.

978,783. n Patented 1160.111910.

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APPLICATION FILED IAB. 18, 1910.

978,783. Patented Deo. 13, 1910.

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ATTORNEYS PATENT' OFFICE.

WILLIAM ROSE, 0F GAINSBOROUGH, ENGLAND.

CAM AND LEVER.

978,783. Specification of Application led March 18,

Letters Patent. Patented Dec. 13, 1910.

1910. serial No. ssono.

To all whom 'it may concern:

Be it known thatI, VILLIAM Rose, a subject 'of' the King of Great Britain and Ireland, of Albion lrVorks, Gainsborough, in the county of Lincoln, England, have invented new and useful Improvements in vor Relating to Cams and Levers or Arms lVorking in Connection Therewith, of which the followingr is a specification.

T his invention relates to improvements in'- cams and levers, or armsoperated thereby, by which improvements more etliciency, less friction, less waste of power, reduced cost of production, and smoother working of the parts of the machine with which the cams are used are secured.

lVhen a cam and a spring are employed, as is usual, to eHect any required movements, the cam operating in one direction'and the spring in the opposite direction, the spring must, of course, be of `such power as to perform the work required in one direction, and the. cam has not only. to perform the work required from it, but also to overcome 25 the power of the spring, this resulting in waste of power, and there is also risk of the spring breaking and causing annoyance and loss of time. Then a grooved cam is employed, as is also usual, the roller, operating in the groove, rotates in one direction, when controlled by 'one side of the cam groove, and it rotates in the opposite direction, whenl controlled by the other sidev'of the cam groove. so that, during every revolution of the cam, the roller has to reverse, which causesI excessive friction and wear on the roller and thecam grooves.

This invention has for its object to obviate these objections, for which purpose I pro- V40 wide a duplex peripheral cam, consisting of two members which may be integral with each other, or be both secured to the same spindle, in any suitable way. Cam levers,

or arms, are provided, one, to be operated by each member of the duplex cam. These levers, or arms,'m'ay both be affixed to, or mounted so as to rock on, a spindle, or shaft, one-lever, or arm, being at one side of the cam shaft, and actedupon by one member of the duplex cam and the other lever, or

arm, being on the other side of the cam shaft, and operated by the other member of the duplex cam; One member of theduplexl cam is timed and designed to cause the de-v sired movement in `one direction, andthe other member of the duplex cam is timedr and designed for effecting the desired reverse movement. I may tix, or form, the two levers, or arms, together, or I may mountand secure one of the said levers, or4

arms, to a shaft, and mount the other lever,

or arm, for the reverse movement, freely onthe same shaft, but hold it in relation to the first named lever by a coiled tension spring, there being provided a device, such as a projection from one, or each, of the said levers, or arms, abutting and acting as a stop, or stops, to maintain the cam levers or arms, at the required angle in relation to each other, so as not to allow the said spring to put unnecessary pressure on the faces of the respective members of the duplex cam and thus reduce friction to a minimum, The said spring, should anything unusual happen to the machine, will yield and thus constitute a safeguard against shock.

\ The accompanying drawing represents an arrangement in accordance with this invention, Figures 1 and 2 being views at right angles to each other. It will be understood that I do not limit myself to the precise details illust-rated.

1 and 2 are the two members of the duplex cam connected together by the collar 3, and keyed to the shaft 4. The member l of the duplex cam bears on the roller 5, on the lever 6, keyed to the shaft 7, and the other member 2, of t-he duplex cam bears on the roller 8, on the lever 9, mounted freely on the said shaft 7. The spring 10, draws the two levers 6 and 9 together, undue force of the bearing of the rollers 5 and 8, on the members 1 and 2 of the duplex cam being prevented by the stops 11 and 12, on the levers (3, and 9, coming together.

What I claim is In a cam operating device the combina- IVILLIAM ROSE.

- Witnesses: Y

H. D. JAMEsbN,

- V. GIARDELLI. 

